My only advice is to make sure those rocks are secured in place. If the fish you get are avid burrowers, then you have a problem. Most species of wrasses, blennies, jawfish and gobies in particular are fond of burrowing under the rocks. Some large fish may even accidentally topple the whole structure causing terrible disasters including crashing of rocks on the glass.

looks two complex just go simple. this guy i knew had a 300g reef tank in his wall one day when he got home from work there was water a dead fish and coral all threw his lounge room a fish mused of knocked over a rock